Pipe cutting machine



I May 31, 1932. 5 WN 1,860,653

PIPE CUTTING MACHINE Filed Aug. 12, 1931 3 Sheets-Sheet l 1N VENTOR.

Wi/Ffifalrh ATTORNEY.

May 31, 1932. H. F. BROWN 1,860,653

PIPE CUTTING: MACHINE Filed Aug. 12, 1951 3 Sheets-Sheet 3 IA'I'EX'I'OR. Jag Zara Wm ATTORNEY.

Patented May 31, 1932 UNITED STATES" PATENT OFFICE HUGE 1". BROWN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO BROWN BROTHERS WELDING COMPANY, OF SAN FRANCISCO, CALIFORNIA, A COPABTNERSHIP ,COM- POSED 0F HUGH 1'. BROWN AND WILLIAM P. BROWN PIPE CUTTING MACHINE Application fled August 18, 1931. Serial No. 556,603.

7 This invention relates to ipe cutting machines, and more particular y to a machine for cutting 03 pipe at various angles by means of an oxy-acetylene torch carried around the outside surface of a pipe to be cut.

It is well understood b those familiar and skilled in the artof'wel 'n'g the ends of two pipes together at an angle, that the pipes must be cut exactly on the angle desired, and that heretofore it has been a very ditficult problem to cut a pipe quickly and accurately using the most practical means,-the oxyacetylene cutting torch. Various devices have been tried to improve the means, but

most of these eiforts have been more or less com licated, and have not as yet proven success 111, one reason being that a machine of this kind mustbe simple, and strong to stand rou h handling, it must be portable as the wor is done in the field where the pipes are cut and welded as they are laid; and among the objects of the invention is to provide a machine that can be applied directly to the pipes in the field, which can be quickly transported from one place to another, and cut the pipe at any angle positively and accurately. Another object is to provide means to cause the cutting torch to follow a path of travel around the pipe to correspond to the angle at which the pipe is to be cut.

Another object is to provide means to carry a torch around the pipe concentrically, and at the same time cause the torch to move longitudinally of the pipe to form the elipse corresponding to the angle required.

Another object is to provide a portable ring adapted to carry the cutting torch, means to rotate the ring around a pipe to be cut, and means to reciprocate the ring longitudinally of the pipe simultaneously, to cut the pipe at the required angle for any desired shape.

Another object is to provide a portable frame to be clamped to a pipe to be out, a

member mounted in the frame adapted to to form the exact elipse of the angle at which the pipe is cut.

Another object of this invention is to provide a machine of this kind whereby changing the ratio of speed between the ring that carries the cutting torch, and the travel of the plate that carries the rin pipe may be cut in various s apes, as required.

Another object is the provision of means to indicate the distance ofi' center the crank pin must be set to cut the pipe on the required angle, the diameter of the pipe, and the angle it 15 to be out being determined.

A further object is to provide a machine in which a great many shapes may be cut in a pipe by slight changes in the setting, and mechanism of the machine.

so that the Other objects will appear to those skilled.

in the art as the description progresses.

An embodiment of the invention is shown in the accompanying drawings in which the Figure 4 shows a pipe cut at an angle, the

elipse of the angle, and an end view of the pipe, all connected by dotted lines.

Figure 5 is a 'view looking fromjahe bottom of the frame, showing the transverse guide bar, and portions of the frame and slide member, partly in section.- v

Figure 6 is a sectional view showin a portion of the frame, and slide mem er, gears, and crank arm. 7

Figure 7 is a sectional detail of the adjustable crankpin.

Figure 8 is a modified form in which a y pivoted link is used in place of the transverse bar to cause the longitudinal travel of the crank.

Figure 9 is another modified form in which the transverse bar is pivoted and can be set on an angle.

and holding the rods one way would he Figure 10 is an enlarged de il of the right angle bars shown i Figure 11 is a view of i mine the ofi'set of the erect. pin

from the machine.

Figure 12 is'a sectional detail of thc 1 The numeral 1 indicates a pipe or {use on which is mounted the machire for cut-ting oil the pipe- To hold the mechanism on the ipe securely, a frame 2 is provided which as bosses 3-4-5 and 6 in "which are mount ed the sliding rods 7 having, the foot plates which rest on the pipe, these plates may he of any suitable shape.

Various means may be used for adjusting to have screw threads on hand wheel to turn them for in J the present instance. set sort" toholdthcrods. Uhains 10 conne plates under the pipe by inca' and 11. Suitable quick detachin ant. L, ting means 12 is shown to clamp the frame rigidly to the pipe.

There is a slot in the frame to receive the slidable plate 13 which is held place by the small plates 14:.

Mounted on the slide is the horiaontal bevel gear 15 by means of the short shaft 16 which is fixed in the gear, and a hearing in the slide 13. Theshaft projects below the frame 2, and has the crank arm 17 fixed on die end. There is a slot 18 in the frame to allow for longitudinal movement of the shaft 16.

The crank arm has the guiding channel 19 in which a block 20 is adapted to slide. There is a flange 21 on the block which turns up on one side to form a support for the set screw 22. the end of which impinges on the side of the crank arm to hold the block in any adjusted position in the chaimel 19. De-

pending from the flanged block is mounted a crank pin roller 23, on thzia pin 24. and this roller fits into the channel 25 of a transverse bar 26 on the frame 2, this channeled bar acts as a guide for the crank pin roller, and allows for the circular movement of the crank arm.

The arrangement of the mechanism is such, that if the block 20 is set in the channel 19 so that the center of the roller is in line with the center of the shaft 16. the turning of the crank arm will not cause any longitudinal travel of the shaft and arm. but when the block 20 is moved along the channel 19 and set, the revolving of the crank arm will reciprocate the shaft longitudinally equal to the crank circle as set, the roller moving transversely in the channel 525. The gear 1.? is in mesh with the pinion 27' fifitlfildi') the shaft 28 which has bearing blocks 29 fixed to the sliding plate 13. The shaftis turned by the crank'disk 30 which is listed to the shaft. At the end of the slidahle plate is mounted a ring housing -1 having suitalile brace 32 to hold. it rigid, and rotatably mounted in the ho up; is the tooth C no cranlt: 7 oi IS a cutting "ore s1 gn. which. is ad D pied to cuttlir iuzg ne pipe shell as it is moved around the pipe. in oxyacetylene torch prcfcrred a a means for cutting through the pipe. hut-1t 1. obvious that any cutting means that will cut. through may he used in connection with this machine to make the cut.

The transverse cl navin a straight ch :lannel har is shown as a to rude th ll i=6 ofsuitaolc detion by. the setscrcw 4:). The form shown in Figure 9 allows of setting the tra s verse bar at an angle. The bar 455 having slidahleguides in the circular guide ways 48, the set screws 49 hold it in place.

In order to save time. it is necessary to have on the machine means to show quickly how much to set the crank pin off center to cut a certain size pipe at acertain angle. Such a device is shown on the machine in Figure 1 and in detail in Figures 10, 11 and 12. The bars 50 and 51 are at right angles to one another. The bar 50 being slidable on the bar 51 by means of the pins 52 and 53, the ends of which slide in the grooves 54 and 55. This allows the bars to fold together. i The bar 51 is graduated in inches to indicate the pipe diameter as at P. The bar 50 has graduations in inches at S indicating the distance oil center the crank pin must be set. A segment of a protractor 56 is mounted on the bar 51, and a bar 57 is pivoted at 58. Lugs 59 are provided for bolting to the machine. The bar 50 has the brackets 60 and 61 held in place hv the rivets 62. A portion 63 is flush with the bar to allow the bar 57 to fold close to liar 51. In operation the bar 50 is moved on her 51 to indicate the diameter of the pipe. then the her 57 is swung on its pivot to the degrees of the angle. and the amount to offset the crank pin is read on the bar 50.

The operation of the machine is as follows:

The pipe to be cut is raised and blocked on timber or the like, and the machine placed with the foot plates on the upper part of the pipe and adjusted to bring the ring housing ill? started, the crank 30 is a the sliding plate back and torch cuts tl'zmugh the met 7 of the loathed gear cai'x ing Hie tog- 32 1 line tins elipse-ef the angle.

it an be seen from the fiiJGYQ descripiion n {11%- dlrawings that provi ion is i0 carry out til-e ob iecs of the inveniion as sei". fez-biz.

Having thus; (inscribed my invention what I desire to secure bv Letters Fatent 0f the United Smiles is as follows lmi modifications may lie had in :arz'ying out 61% invention as shown in llie accompanying drawings and partianlarly deszcribe form filigree? within the purview of the annexed claims.

1 shim:

i. A. pipe cutting machinz; of the class (iascribell wmnrising 8, 2 113111?) ailanted to lie clamped in a pipe to be cuiefi. a plate ma @cl slide longitmlinsily (if said pipe in suit? frame, a ring housing mountl on saiii plate cencentric with said Di'p, a rotatable ring; in sairi housing, a cutiing torch 0n said rin ,2, n vericaii shaft projeci'ng above and below said nlate, and having a bearing in the plain, a navel gear on the upper endof said shaft 2 (Tank arm on the lower encl. a transvewe guide bar in saili frame, a pin adapt-ed 110 be gruidefi in tlfiDSVQiSfi motion in said lwx means in ncljnstably comma snirl in: f cmnlz arm and means to tum s2 nil min rwclu-Jion while the rotalianle ring; is tuinefi ens. revoluticn.

2 A machine of the class (inscribed com prising a, frame adapted to be clanipe in a in he cut, a plane mounted in slide l0ngiin iinnilv a?" said pipe n said frame, a trans:- rversn guide lmrin saw; man a sliafl nmnnb 95 in saifi plate, a crank arm nu aiql a pin adapt ed in slin in said-31mins? gnuie i381 and be mlyusiably aitaclied-i sai arm whereby the turning; 1 line C? iii; arm will THOVQ'i-iifi nlnte, a ring: imaging plane, a rotaiable ring in imusing, a cutting torch 611 said ring ancl mean in "him the ring and crank arm ens revolutinn sinml taneously.

3. A machine far suiting pipe compriP- ing a frame to be afitached to a pipe ts out, a longitudinally slidable plate in sairl frame, a ring housing on said plain, a int-aiable ring in said housing. a cutting mm an said rotalable ring, a shaft in said plate,

is be rotated llOIlZOIba longitudinally acl- (l ank arm, a pin on .2 smile in the transverse said blank m L V l guide wlierebyva complete turn 0f the crank arm will re lpmcane said plate and ring imnsing nmi iii-51316 to drive rotaiable ring" and cmnk arm simultanaously.

i. 2 machine of 1 118 class described con a frmne adapted lobe clamped to a min a plate mounted to slide l0ngi- 1m pivoi'ed in sail? Emma, means ml bar in different pssiiiens. a shaft mounted in said. plate. a (rank on said shaft :1 pin Minn e-(l is slide in said transverse gninle nnfl adju lmiile relatively 0 arm Wli lfi' fin hn'ning o"? the Q2 7111i: nmn

will move sakl plate a ring lmnsing 11 an plate mintahle in Sfllfl lmw ting inrch on said the ring and wank 2mm in geared 2xprozlucthe desired shape 0? out an the 110 5. A machine of iilia class clescriberi com-'- prising a {Tame adapted in clfimnad n pipe to cni W?- mounted to slide longitudinally 0i 5:? 5i wipe in said frame, shaft Inmmiecl in said nlnte, a err arm on said shaft means in acljusfably can; actsaid crank 3TH; 50 said frame whereby the turning of the 011ml; awn wi l reciprocate the plate, a r ng hmzsin e, a rotatal la ring in said w arch on said. ring, and n lib: i'ing' crank arm in in produce the ilesireii shzipe e nip?- machine of the class describe cl comcngzii crank way way, means "@0- imlclsaid block in any adjusted position in saicl gniclQwa-y, a pin in said block, a. roller on said pin a izrans erse guideway for said roller whereby the turning (if said crank arm will reciprocate said plate, means in turn said shaft and crank arm, a ring iZGiZSiUgI on said piate, a rotatable ring in said ima ing, a flfilifig -larch on said ring, and means to iiurn the ring on-a revolution to one am 9:? the crank arm.

A machine of the class (lescribecl con1- prising a frame, a plate slidnble longitudinail in saiil frame, a ringhonsing on said plane, a rctatable ring in said housing, a larch for flitting metal sn'saicl ring, means is 310155 said frame longitudinally 0% a pipe tn lie 212%,, means in set sairl ring g concentric "'10 sairi pipe, :1- verticai shaft having a bearing in said plate and (mien-ding above shaft, :1 transverswsi I zclapted to be clzzmpe-(l to a said late, and below said frame, a slot in said rame for said shaft, a channel shaped crank arm on said shaft below said frame, a block adjustably fixed-in said channel, a pin in said block having a roller below said arm, guiding means to connect said roller to said frame so that when said crank arm rotates a reciprocating motion will be imparted to said plate, and means to drive said shaft.

8. A machine of the class described comprising a frame, a plate slidable longitudinally in said frame, a ring housing, a rotatable ring in said housing, a cutting torch on said ring, means to rotate said ring, and adjustable means mounted on said plate and connected to said"frame to move said plate to and fro while said ring makes one revolution.

9. A machine of the class described comg prising means to carry a cutting means around the outer surface of a pipe, a rotatable crank arm having adjustable connecting means adapted to move said cutting means by said crank arm longitudinally of as said pipe to cut an elipse around said. ipe at a predetermined angle, and means to rive said cutting means and crank arm simultaneously.

10. A machine of the class described comso prising means to carry a cutting means around a pipe, a crank arm having a shaft adapted to move said cutting means longi tudinally of said pipe, a crank pin in said crank arm, means adjustably securing said 35 pin in said arm, guiding means for said pin whereby said shaft is moved to and fro with the cutting means and while the cutting means travels around the pipe to cut an elipse for any desired angle of cut, and means to D drive said cutting means and said crank shaft. HUGH F, BROWN. 

